<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"> 
<title>菜鸟教程(runoob.com)</title> 
<style>
a:link,a:visited
{
	display:block;
	font-weight:bold;
	color:#FFFFFF;
	background-color:#98bf21;
	width:120px;
	text-align:center;
	padding:4px;
	text-decoration:none;
}
a:hover,a:active
{
	background-color:#7A991A;
}
</style>
</head>

<body>
<a href="/css/" target="_blank">这是一个链接</a>
</body>
</html>